Hmm, I've actually never heard of this before. I assume that you tested it here and it doesn't work?
If it's not enabled by default in the latest eqemu builds, then I doubt it works anywhere since someone would have to build out the feature.
The point is just to keep anything in a no-rent bag from poofing when you log off? Personally, I've never really found no-rent bags to be a problem, so I haven't thought much about them.
What's the benefit of relying on summoned bags instead of just getting normal backpacks/containers? If I understand the problem it's solving, maybe I can find a workaround.